Problem with Drag and Drop Sharing

I am having some trouble with the Sharing Buttons for this blog. I need to add sharing capability so I went to the Settings Tab in the Dashboard and clicked on the Sharing Link. I then picked up the Facebook Button and started to drag it to the "Enable Box" for it to be added to my blog. The Problem is the "Enable" box is grey and it will not let me drop the share button to enable it.

I thought it was my privacy setting so I went to the Settings Tab and clicked on the privacy link. My blog is set so that people and search engines can search and find my blog.